You can accomplish both those tasks by furring the floor up using lumber and plywood.

If headroom is more limited, furring down the ceiling and then covering it with a finished material is a possible solution.

The insertion of a separate air barrier may add additional cost but can be accomplished with relative ease with masonry cavity or veneer walls or walls containing an interior finish, such as furred drywall.

There are 2 main definitions of fur in English:

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noun (plural same)

He believes that the non-Arabs in Sudan - an alliance of Southerners and marginalised groups in northern Sudan, such as the Fur - form a numerical majority and should dominate a secular, pluralist and united Sudan.

Darfur means ‘Homeland of the Fur, ‘the name of one of the remote region's sedentary, non-Arab tribes.’

Low-level fighting among communities in western Sudan (all of which are Muslim) has been endemic since the late 1980s, when a war broke out between the Arabs and the Fur, two of the ethnic groups involved in the present conflict.